New Red Sandstone

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The New Red Sandstone is a chiefly British geological term for the beds of red sandstone and associated rocks laid down throughout the Permian (280 million years ago) to the beginning of the Triassic (240 million years ago) that underlie the Jurassic Lias; the term distinguishes it from the Devonian Old Red Sandstone. The New Red Sandstone derives its name purely from its relation to the relatively older Devonian Old Red Sandstone. Its upper layers consist of mudstones, but most of the formation consists of reddish sandstones, interbedded with rare evaporite minerals such as halite and gypsum; these indicate a palaeo-environment of deposition being hot and arid e.g. a desert.

Pagina's: 148, Paperback, Betascript Publishers